Pumping machine



2, 1930'. A. MOREFIELD 1,773,057

PUMPING MACHINE Filed May '7, 1928 lnven for Patented Aug. 12, 1930 UNITED STATES ALBERT MOREFIELD, OF WAPATO, WASHINGTON PUMPING MACHINE,

Application filed May 7,

connected by a flexible cable, the pistons being held in their spaced relation by a non-com- 10 pressible fluid.

Still further obj ects of my invent-ion are to provide, first a flexible cable for the rigid rod, now ordinarily used; second, to make possi ble an automatic replenishing means of the 15 fluid between the pistons; and third, to reduce friction of the moving parts.

Additional objects, advantages and teatures of invention will be apparent from the following description and accompanying drawings wherein, V

Figure 1 is a top plan view of the pump, the pistons having been removed,-

Figure 2 is a side elevation thereof, Figure 3 is a vertical section on the line 11 of Figure 1, showing the pistons in operative position with the pump barrel. In carrying out my invention I provide a main barrel 1 having tandem cylinders 8 between which there is a chamber of slightly greater diameter than the cylinders 8, as clearly shown in Figure 3. The lower end of the barrel 1" has an intake 9 and footvalve 11 whereby fluid may be retained within the chamber 10. A discharge pipe 15 is suitably connected to the chamber and a checkvalve 12 is provided in the pipe 15 to confine fluid therein, as will be hereinafter explained; The upper endof the barrel 1 has a vent 7 communicating with the upper cylinder 8, whereby air which may be trapped in the cylinder may be vented to the atmosphere.

Intermediate the length of the barrel 1 and adjacent the upper end of the chamber 5, connection is made between the chamber 5 I and the discharge pipe 15. A check valve 6 is disposed in this connection so'arranged as to permit fluid to enter the chamber 5, at times. Slidable within the upper and lower cylinders 8 there is a pair of pistons 1 and 2 arranged in tandemrelation with one another 1928. Serial no. 275,632.

and connected by a cable 3. The pistons 1 and 2 are disposed within the cylinders 8 so as to confine the chamber 5 therebetween.

In operation, the chamber 5 is filled with a non-compressible fluid, by removal of the plug 13, or the fluid may be supplied to the chamber 5 through the pipe 15 and check valve 6. The pistons l and 2 are actuated through the rod 4 from a power plant (not shown). The up or'suction stroke of the pistons draws the fluid being pumped, up through the screened inlet 9'into the receiving chamber 10 where it is held bythe foot valve 11, which closes automatically upon the start of the down or discharge: stroke. The fluid pumped into the chamber 10 is expelled by the piston 2 through the ball-valve 12 by the down or discharge stroke into the discharge pipe 15.

Attention is now directed to Figure 3, wherein it will be seen that power is applied directly to the upper piston 1, by the rod 4 on the down stroke, transmitting motion indirectly to the piston 2 through pressure on the fluid in the chamber 5, so that th'e'flexible cable 3 is kept taut on the down or discharge stroke, as well ason the up or suction stroke.

'Of course, on the up or suction stroke,'the power is applied directly to both the upper piston 1 and the lower piston'2 by reason of the flexible'cable 3. i I

To insure a full down or discharging stroke,the chamber 5 is automatically kept constantly filled. Any loss offiuid in the chamber 5, through leakage or otherwise, slackens or permits flexing of the cable 3 on the down or discharge stroke, shortening it and reducing the length of thedown stroke in its effective operation on the lower piston2 and thus reducing the amount of fluid delivered from the pump. However, on the succeeding up or suction stroke ofthe pistons, the flexible cable 3 is again drawn taut, producing a suction of fluid from the discharge pipe 15 through the'ballvalve 6'and thus auto matically replacing the loss of fluidin the chamber 5. 1

Removal ofth'e plug 13gives free access to the ball valve 6, as well'as permitting initial charging of the chamber 5 with fluid.

If desired, the pistons 1' and 2 may have 9 lo M q m V leather cups 14 at their ends to afford a packmi between the pistons and cylinder walls. rom the foregoing description, it will be 7 readily apparent that en 'ne vibration is not 5 communicated so readi to the pumping mechanism as in the ordinary rod type of .P p wd a at r is a pnsi erable reducing oi igi and. consequent Wear- The cushioning effect produced by the fluid medium in the chamber 5 makes ossible a more rapid rate ofeperating'spe Further, the fact that ail arts move in a continuous bath of fluid, riction is reduced to Y a minimum, and increased efliciency in rate 15 ofgpun pmg speed is possible.

5 2.1m: LT -v A pumpofithe class described compriswhen-net, a pmr oif tandem pistons slid ahbmwmcin said barrel, a column of fluid w therebetweenfa flexible cable conpistons,-and said barrel having qqlye-l neanswfor mplenishing fluid between mafik mns automatically upon the suction myment of-said piston. I

3- ad; pum oi theclass described comprisaving a fluid chamber, a pair of we slidably mmmted in said barrel and so as to-confine said chamber there- ,a fluid confined in said chamber, a cable connecting said pistons,- a disw nn cted, to said barrel, and e a magic mcansimstideonnection whereby to an ply fluid 'dfemvsaid discharge pipe to chamben upo upward movement 7 ad etfiefidzpistona I n 1 a a; pump of the class described coniprisiega barrel hamingafluid chamber, a pair 13% w slidablyimcunted in said barrel a n. n 1 d sc; se-to confine said chamber 7 a fiuidimfined in'said cham-. m'fi'eflezibla .eublaconneeting said pistons, eirge pipe con ec d to said barrel, 01: vcnhngeir confined between said andmeannior supplying fluid from (II said'dischar pipe to said fluid chamber rupwar momnticf said pistons Amman ai time cilaeswdescrlbed comprisfiibarnefl I; we; aflwld chamber: intermeitsqlength meinlet adiacent and o 8, ffib 'l'ardlmrepemtively associated i: W in; ,mi aidme'scberge pipe connected fifi'r fiifiirbamiiabohbj midfodtvalve, a conduit e therein permita shncagsehechwa B1B ting of in one direction, and wezgiblys connectedpistons slid'ably in smiQbm-QL and; disposed so as to Mfiliwai c lumn d! fii i d adjacent said fluid chmrg mherebyw n suction stroke of said '1' with dwwn from said dise pipe intosaid fluid chamber to replenea-a e it id confined between-said pistons. 

